Question:

In the organic compound \(CH_2 = CH-CH_2-CH_2-C≡CH\), the pair of hydridised orbitals involved in the formation of \(C_2 – C_3\) bond is

Updated On: Jan 19, 2026
  • \(sp-sp^2\)

  • \(sp-sp^3\)

  • \(sp^2-sp^3\)

  • \(sp^3-p^3\)

Hide Solution
collegedunia
Verified By Collegedunia

The Correct Option is B

Solution and Explanation

To solve this problem, we need to examine the organic compound \(CH_2 = CH-CH_2-CH_2-C≡CH\) and determine the types of hybridized orbitals involved in the \(C_2 – C_3\) bond.

  1. Firstly, identify the structure of the compound and the types of bonds:
    • \(CH_2 = CH-CH_2-CH_2-C≡CH\) is composed of a chain where:
      • \(C_1\) is attached to \(CH_2\) (double bond),
      • \(C_2\) is part of a double bond \((CH_2 = CH-)\),
      • \(C_3\) is part of single bonds on either side \((-CH_2-CH_2-)\),
      • \(C_4\) is bonded again to single-bonded carbon,
      • \(C_5\) is part of the triple bond \((-C≡CH)\).
  2. Identify the hybridization of the involved carbons:
    • Carbon \(C_2\) is part of a double bond \(CH_2 = CH-\), which is typically \(sp^2\) hybridized.
    • Carbon \(C_3\) is part of single bonds to form \(CH_2\), which is typically \(sp^3\) hybridized.
  3. For the bond \(C_2 – C_3\), the pair of hybridized orbitals involved are those from these two carbon atoms:
    • The \(C_2\) (double bond portion) is \(sp^2\) hybridized.
    • The \(C_3\) (adjacent single bond portion) is \(sp^3\) hybridized.
  4. Thus, the pair of hybridized orbitals involved in the formation of the \(C_2 – C_3\) bond is \(sp^2-sp^3\).

In conclusion, the correct answer is actually \(sp^2-sp^3\), not the provided correct answer, as there seems to be an error in the key solution.

Was this answer helpful?
0
2

Concepts Used:

Organic Chemistry – Some Basic Principles and Techniques - Reaction Mechanism

SN1 Reaction Mechanism:

SN1 reaction mechanism takes place by following three steps –

  • Formation of carbocation 
  • Attack of nucleophile 
  • Deprotonation 

SN2 Reaction Mechanism:

The SN2 reaction mechanism involves the nucleophilic substitution reaction of the leaving group (which generally consists of halide groups or other electron-withdrawing groups) with a nucleophile in a given organic compound.

Electrophilic Aromatic Substitution Reaction Mechanism:

The mechanism of an electrophilic aromatic substitution reaction contains three main components which are:

  1. A new sigma bond from C=C is formed during the reaction in the arene nucleophile.
  2. Due to the breaking of the C-H sigma bond, a proton is removed.
  3. The C=C bond is reformed and it restores the aromaticity of the compound.

Electrophilic Substitution Reaction Mechanism:

The electrophilic substitution reaction mechanism is composed of three steps, which will be discussed more below.

  • Electrophile Generation
  • Carbocation Formation
  • Proton Removal